Lotus said that there's a <A HREF="http://cnet.com/news/0-1009-200-1519170.html?tag=st.cn.1.lthdne">Y2K-related</A> bug in Domino that can cause client software to crash when a document included in a Notes/Domino message contains a year date greater than 2000 or before 1950. According to News.com, the versions affected are R5, 4.6.6 and 4.5.7.